Circuit to characterize matching of energy-storage components

Abstract

A circuit to characterize the matching of energy-storage components is provided. The circuit includes a linear resistor and a power source. The circuit is electrically connected to two serially connected energy-storage elements, for example, a pair of capacitors. The matching between the two capacitors can be evaluated by measuring the slopes of a function relating the input and the output voltageof the circuit.

1. A circuit configured for checking a degree of a matching between a first energy-storage element and a second energy-storage element, wherein a second terminal of the first energy-storage element is coupled to a first terminal of the second energy-storage element, and the first energy-storage element and the second energy-storage element are electrically coupled in series; the circuit comprising:
 a linear resistor, wherein a first terminal thereof is electrically coupled to a signal output terminal of the circuit and a second terminal thereof is electrically coupled to a second terminal of the first energy-storage element and a first terminal of the second energy-storage element; and 
 a power supply having an output terminal electrically coupled to the second terminal of the linear resistor, applying a plurality of voltages to a first terminal of the first energy-storage element and a second terminal of the second energy-storage element to ground, whereby the degree of the matching between the first energy-storage element and the second energy-storage element is obtained. 
 
   
   
     2. The circuit of  claim 1 , wherein both the first energy-storage element and the second energy-storage element are capacitors. 
   
   
     3. The circuit of  claim 1 , wherein the power supply includes a current supply. 
   
   
     4. The circuit of  claim 1 , wherein the first terminal of the first energy-storage element is electrically coupled to a dc voltage and the second terminal of the second energy-storage element is grounding. 
   
   
     5. The circuit of  claim 1 , wherein the first terminal of the first energy-storage element is grounding and the second terminal of the second energy-storage element is electrically coupled to a dc voltage.